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CLRC663 Datasheet(PDF) 21 Page - NXP Semiconductors

Part # CLRC663
Description  Contactless reader IC
Download  132 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

CLRC663 Datasheet(HTML) 21 Page - NXP Semiconductors

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CLRC663
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 3.3 — 3 April 2012
171133
21 of 132
NXP Semiconductors
CLRC663
Contactless reader IC
Remark: To send more bytes in one data stream the NSS signal must be LOW during the
send process. To send more than one data stream the NSS signal must be HIGH between
each data stream.
8.4.3 RS232 interface
8.4.3.1
Selection of the transfer speeds
The internal UART interface is compatible to a RS232 serial interface.
Table 20 “Selectable transfer speeds” describes examples for different transfer speeds
and relevant register settings. The resulting transfer speed error is less than 1.5 % for all
described transfer speeds. The default transfer speed is 115.2 kbit/s.
To change the transfer speed, the host controller has to write a value for the new transfer
speed to the register SerialSpeedReg. The bits BR_T0 and BR_T1 define factors to set
the transfer speed in the SerialSpeedReg.
Table 19 “Settings of BR_T0 and BR_T1” describes the settings of BR_T0 and BR_T1.
Fig 13. Connection to host with SPI
001aaj641
tSCKL
tNSSH
tSCKH
tSCKL
th(SCKL-Q)
tsu(D-SCKH)
th(SCKH-D)
th(SCKL-Q)
t(SCKL-NSSH)
SCK
MOSI
MISO
MSB
MSB
LSB
LSB
NSS
Table 19.
Settings of BR_T0 and BR_T1
BR_T0
01234567
factor BR_T0
1124816
32
64
range BR_T1
1 to 32
33 to 64
33 to 64
33 to 64
33 to 64
33 to 64
33 to 64
33 to 64
Table 20.
Selectable transfer speeds
Transfer speed (kbit/s)
Serial SpeedReg
Transfer speed accuracy (%)
(Hex.)
7.2
FA
0.25
9.6
EB
0.32
14.4
DA
0.25
19.2
CB
0.32


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